When a CUI container is lost, who should be notified immediately?

• A. The building security guard.
• B. A coworker in the same team.
• C. Public relations office.
• D. The designated official.

Answer: (A)

When a CUI container goes missing, you escalate immediately to the designated official who oversees the CUI program. That person is responsible for coordinating the incident response, initiating required reporting, and guiding containment and recovery steps. Building security should be involved to secure the area and assist with immediate physical safety, but they are not the primary channel to trigger the formal incident response. Coworkers on the same team might notice the loss, but the official channel ensures the incident is documented, routed to the right authorities, and handled according to policy. The public relations office would only be involved later if communications about the incident are required, not for the initial reporting and response.